The kittens have recovered from the Vacuum Cleaner Incident. In fact, yesterday afternoon the monster came out again, and howled for a couple of minutes; the kittens, holed up in their favorite daytime nap spot under the comfy chair, only reached the "alert and curious" state, far from the previous day's panic.
They don't like being in their cage with the door closed, though. So, instead of sleeping in their cage as per the two-legs plan, they've taken to sleeping on the sofa, after first clearing off the pointy plastic thingummies that are meant to keep cats off the upholstery. Specifically, meant to keep Piggy off, 'cause she likes to pee on the furniture.
But, as long as the little fuzzballs are out there, Piggy stays clear of them, so they act as sort of an Active Sofa Denial System.
Piggy, meanwhile, is addressing the problem of kittens exploring the back part of the house by taking up a defensive position in my office doorway:
Git off my lawn!